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Message: <blockquote data-quote="RadioHowie" data-source="post: 1167075" data-attributes="member: 426">Don't despair yet....Leave the bike on a charger overnight to make SURE the battery's completely charged. Even though you recently put a new battery in it, you haven't been working with a 100% charged battery and your voltage drop from 14.02v to 12.7v when you plug the headlights in could simply be that you're monitoring the "surface" charge. The 14.02v at idle is a terrific sign that the Roadstercycle harness is doing exactly what it's supposed to be doing, but the battery doesn't have enough of a full charge to prevent dropping to 12.7v when you dump a 120watt load on it.Charge that sucker up completely, then take new readings. That's the only way you can be sure you don't have some other issue, because 14+vdc at idle is "Golden".</blockquote>